We almost eradicated measles in the U.S., but anti-vaxxers had to go and ruin it for everyone. WTF? Dr. Abdul El-Sayed walks us through the history and science of vaccines and the growing anti-vax movement. We meet the people affected, like Ethan Lindenberger, an 18-year-old who defied his anti-vax mom to get vaccinated.

For a transcript of this episode, please visit crooked.com/americadissected.